Yahya bin Ayoub al-Ghafiqi يحيى بن أيوب الغافقي · The Book on Marriage

The Messenger of Allah said: "Indeed the conditions most deserving to be fulfilled are those that make the private parts lawful among you."

"Ghilan bin Salamah Ath-Thaqafi accepted Islam and he had ten wives in Jahiliyyah who accepted Islam along with him. So the Prophet ordered (him) to chose four (of them)."